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Related Clues:
- Fish-finding aid
- Your boy is up to painting this, by the sound of it
- 'Thus ran back, by the sound of it (5)'
- Mine locator
- Thus ran back before radar, by the sound of it
- Aid in finding the Titanic
- Submarine-detecting device
- Echolocation acronym
- Submarine sensing system
- System used on a sub
- Sunken-object detector
- Submarine locator
- Bat's detection tool
- Ship's aid (Issue One) with reverse
- Detector of meson, a research tool